Users on Beta ROM must have got OTA update through updater app. If you have not got it, kindly wait for some time or try clearing updater app data. If you are impatient to try MIUI 9 on your devices, you can download Recovery/ Fastboot ROM from the links provided below.

2. You can also download the full ROM and update via Fastboot method (Full wipe suggested when updating from old MIUI versions）- Please read the Flashing Guide - Click Here- Data Backup before Full Wipe- Full Wipe required for Dev ROM to Stable ROM
- Full Wipe required for Stable ROM to Dev ROM

Note:

For flashing the Fastboot ROM you need to download the MiFlash tool. You can download the flash tool from Here

Also, you need to unlock your device if you are flashing the Fastboot ROM

Please go to "Updater" and choose full package zip file to upgrade. If you are updating from other ROMs, please don't forget to back up and wipe all data before flashing to avoid data conflicts. Use Clean All option in the new Mi Flash Beta Tool while flashing to perform a full wipe and fresh install.